What happened: https://bitcointalk.org/index.php?topic=1472638.100
Scammers Profile Link: Notaek https://bitcointalk.org/index.php?action=profile;u=76847
Reference Link: https://bitcointalk.org/index.php?topic=1472638.100
Amount Scammed: It's hard to say how much he got, but .3 BTC seems a ok figure
Payment Method: Bitcoin
Proof of Payment: Anything associated with these Addresses could be an answer https://blockchain.info/address/1LnjyM12aPkzceninWeoEFkiTYXpVNH6Tp Altough with the mixers it's hard to say.
PM/Chat Logs: N/A
Additional Notes: This thread https://bitcointalk.org/index.php?topic=1472638.100 and especially this reaction should explain all:
https://bitcointalk.org/index.php?topic=1472638.msg14915087#msg14915087
There is a difference between being dumb (no understanding of real world events) and acting dump. The fact he paid it just hours ago, while the scam was "cleared" early morning tells it all.
The Manager BTCat also doesn't seem very 'intelligent' he closes the thread without ANY explanation at all. Which is suspicious